Odor Removal Service in San Mateo County, CA

Cleaned, Painted, and Replaced the Carpet in San Mateo County — and the Smell Still There?

If you've thrown enzyme treatments, ozone runs, fresh paint, and new carpet at a Peninsula home and the pet odor keeps coming back, the source is past every surface you can reach — it has already penetrated the subfloor, drywall, or concrete below.

If you've already tried cleaning and the smell keeps coming back, the problem is not on the surface.

Cleaning may remove visible urine, but when the smell remains, the odor is coming from urine embedded below the surface. If you haven't identified where the odor is coming from, you're guessing — and guessing is what leads to repeated cleaning, failed repairs, and wasted money.

In many San Mateo County homes, the urine is embedded in the subfloor, drywall, or concrete below the surface. It will continue to come back until the source is properly identified and treated.

We're not a cleaning service — we identify and treat urine odor embedded in the subfloor, drywall, concrete, and framing below the surface. Our structural odor seal is designed to help contain and reduce embedded urine vapors. Backed by a 5-year written guarantee on qualifying work.

Serving San Mateo, Daly City, Redwood City, South San Francisco, San Bruno, Pacifica, Foster City, Burlingame, Belmont, Menlo Park, Half Moon Bay, San Carlos, Millbrae, Hillsborough, and all San Mateo County for 30+ years.

Get a Free Quote Call (877) 386-3677 Schedule a Pet Odor Inspection

Most projects start with a quick phone call to determine if an inspection is needed.

If you can smell it, we can find it. If we can find it, we can treat and seal it at the source.

Founded 1989 • Pet Odor Specialists Since 2000 • Structural Remediation Since 2012

Odor Types We Service

Odor Removal Across San Mateo County

Structural odor remediation across San Mateo County — we treat and seal odor at the source, backed by a 5-year written guarantee on qualifying work and 30+ years of field experience.

Pet urine odor (cat & dog)
Our specialty: urine that has soaked past the carpet into padding, subfloor, drywall and slab. We find it, remove what has to go, and seal the rest at the source.
Pet odor removal by city in San Mateo County
Animal & biological odor
Feces, shelter and hoarding conditions, and rodent or wildlife contamination.
Cockroach & pest-infestation odor
Odor left in walls, subfloor and cabinetry after an infestation.
Human urine & transient odor
Human urine odor from incontinence, neglect, or vacant and transiently occupied residential and commercial properties, plus similar transient-source odors.
Other persistent odors
Assessed per inspection. We take qualified jobs after a free phone consult.

If This Sounds Familiar

If You're Dealing With Any of These — You're in the Right Place

Every one of these points to the same thing: urine embedded in the subfloor, drywall, concrete, or framing below the surface. We address each one.

Bought a home in San Mateo County and now it smells like cat urine
Tenant moved out and left pet urine odor behind
Removed old flooring and the smell is still there
Our pets ruined our carpet and we're replacing it — we want the subfloor odor gone before new carpet is installed
You've already tried cleaning and the smell keeps coming back
Planning new flooring installation and need subfloor evaluated first

Common Odor Problems by Area in San Mateo County

30+ years of work across San Mateo County means we've seen the contamination patterns specific to each part of the county. Here's what we typically find by area.

Daly City / South San Francisco / Pacifica — Coastal Smell That Returns Daily With the Fog

"Bought a 1950s Pacifica coastal cottage. Smell hits every morning when the marine layer rolls in. Previous owners had cats. We've tried ozone, enzyme cleaner, repainting. Nothing works for more than a few days."

Persistent Pacific marine layer humidity brings cat urine reactivation back through the original wood subfloor. Surface treatments can't reach what's already past them.

Real North Peninsula Job

Pacifica coastal cottage — fog-belt humidity reactivating cat urine across vintage subfloor and plaster walls — 1950s coastal cottage in Pacifica with vintage wood subfloor and plaster walls. Persistent Pacific marine layer humidity was reactivating embedded cat urine contamination on a daily cycle. Inspection revealed contamination across the subfloor and partial wicking into lower wall sections. Common in Pacifica, Half Moon Bay, and Coastside vintage construction where ocean humidity drives daily reactivation. Once the source is identified, the affected materials are treated so the odor doesn't come back.

Cities served: Daly City, South San Francisco, San Bruno, Pacifica, Brisbane, Colma, Broadmoor

San Mateo / Burlingame / Hillsborough — Multi-Decade Pet Urine in Premium Vintage Subfloors

"Bought a 1930s Spanish home in Burlingame. Multi-decade pet history across owners. Smell becomes obvious during damp Bay mornings. Need this addressed before our remodel starts in 6 weeks."

Decades of cat urine have penetrated the original Douglas fir subfloor. Bay humidity brings the smell back on a daily cycle.

Real Central Peninsula Job

Burlingame 1930s Spanish home — vintage Douglas fir subfloor with multi-decade cat urine contamination — 1930s Spanish home in Burlingame with original Douglas fir subfloor throughout main living areas. Inspection revealed cat urine contamination across the subfloor in three rooms from previous owners' multi-cat household over many years. Common in Burlingame, San Mateo, and Menlo Park premium vintage construction where multi-decade ownership cycles produce accumulated contamination. All affected materials are addressed so the odor doesn't return after remediation.

Cities served: San Mateo, Foster City, Belmont, San Carlos, Burlingame, Millbrae, Hillsborough

Menlo Park / Atherton / Woodside — Inherited Pet Damage After Stanford-Area Tenant Move-Outs

"Just closed on a Menlo Park property near Stanford. Faculty owner had cats. Smell becomes obvious during the first damp Bay morning. Trying to figure out what we're dealing with before the kids move in."

Years of cat urine have saturated the original wood subfloor. Bay humidity brings the smell back on a daily cycle.

Real Job

A new owner closes on a Menlo Park property and the smell becomes obvious during the first damp Bay morning. Multi-decade pet ownership has soaked into the original wood subfloor. Once the source is identified, the affected materials are treated so the odor doesn't come back.

Cities served: Menlo Park, Atherton, Portola Valley, Woodside, Redwood City, East Palo Alto

Foster City / Redwood Shores — Slab Contamination Found Before New Flooring Installation

"Pulled the carpet in our Foster City house for new flooring. Slab below has a faint smell. Originally built on landfill — wondered if it was something from underneath. Flooring installer scheduled in 8 days."

Once the carpet came up, pet urine had absorbed into the concrete slab below. The slab gets sealed before new flooring goes in.

Real Foster City Job

Foster City 1960s tract home — slab-on-grade with multi-pet contamination, pre-listing discovery scenario — 1960s tract home in Foster City with slab-on-grade construction (planned community on landfill). Sellers preparing to list discovered pet contamination underneath the carpet they were replacing. UV blacklight inspection revealed extensive contamination on the concrete slab from extended pet ownership. Common in Foster City, Daly City, and San Bruno mid-century tract development where slab contamination is the dominant pattern. The subfloor or slab is treated and sealed so the area is ready for new flooring installation.

Cities served: Foster City, Redwood Shores

Half Moon Bay / Moss Beach / Pescadero — Vacation Rental Smell That Won't Lift in Coastal Humidity

"Vacation rental owner. Half Moon Bay property — cleaning crew flagged a strong smell after months of guest pets. The Pacific humidity makes it worse every morning. Booking starts again in 11 days."

Months of guest pet urine have wicked into the wood subfloor. Persistent Pacific humidity brings the smell back daily.

Real Job

A vacation rental owner in Half Moon Bay preps for season and the cleaning crew flags a smell that's strongest in the morning damp. Months of guest pet turnover has soaked into the wood subfloor. The affected areas are addressed so the unit can be turned over without recurring odor issues.

Cities served: Half Moon Bay, Moss Beach, Montara, El Granada, Pescadero, La Honda, Loma Mar

Every property is different. An inspection is required to determine the exact scope and cost.

Odor Problems We Handle in San Mateo County

Each service below addresses a specific contamination type. Pick the one that matches your situation to see process, scope, and pricing.

Where the Smell Is Coming From

What Caused the Odor

Where to Start / Special Situations

What Happens If You Don't Fix It

Odor inside materials doesn't go away — it becomes more noticeable as the home heats up, closes up, or sits over time.

The smell intensifies
Urine remains embedded in subfloor, drywall, concrete, or framing and reactivates when temperature or humidity changes — which is why the smell often gets stronger when the home warms up, when windows have been closed, or after rain raises indoor humidity.
New flooring over contamination doesn't last
New flooring may temporarily suppress the odor, but if the subfloor or concrete is contaminated, the smell will come back. We remove contaminated flooring and dispose of it, then treat the subfloor or slab so it's clean and ready for new flooring — ready for your contractor or flooring installer.
Remediation cost increases
The longer urine sits in subfloor, drywall, and framing, the deeper it penetrates. Today's $3,500 job is next year's $7,500 job.
Property value drops
Pet urine odor can reduce resale value by 5–15% — often more than the cost of proper remediation.

Remediate now, or remediate later at higher cost.

Every Project Starts With an Inspection

If you don't identify the source, you'll never get rid of the odor.

Our Pet Odor Inspection Service finds the source, maps the contamination, and documents the damage. You get an itemized estimate and a written summary report — a professional document for negotiations, disputes, or remediation planning.

Free phone quote. The inspection is the diagnostic step — not a sales call.

Schedule a Pet Odor Inspection

Frequently Asked Questions — San Mateo County

Do you actually come out to San Mateo County?

Yes. San Mateo County is within our regular service area. We cover San Mateo, Daly City, Redwood City, South San Francisco, Burlingame, Menlo Park, and all surrounding communities.

How much does pet odor removal cost in San Mateo County?

Cost depends on contamination scope, surfaces affected, and square footage. Every project starts with our inspection, which produces an itemized estimate. Free phone quote available.

Do you work with San Mateo County real estate agents?

Yes. We regularly work with San Mateo County real estate agents on pre-listing remediation, post-purchase discoveries, and disclosure disputes. Work is coordinated with the property owner or their contractor as needed.

How long does the project take?

Most full-home projects are completed in several working days. The exact timeline depends on the size of the home and severity of contamination — your inspection report includes a project-specific timeline. The job isn't complete until the odor is gone and you approve it during the final walkthrough.

How long after treatment will the odor be gone?

In most cases, once sealing is complete, the odor is gone within 24 hours. Extreme cases may require a double coating but that's rare.

Is the 5-year guarantee in writing?

Yes. We provide a 5-year written guarantee on qualifying work. Documented on every project.

Cities We Serve in San Mateo County

San Mateo, Daly City, Redwood City, South San Francisco, San Bruno, Pacifica, Foster City, Burlingame, Belmont, Menlo Park, Half Moon Bay, San Carlos, Millbrae, Hillsborough, Atherton, Portola Valley, Woodside, East Palo Alto, Brisbane, Colma, Broadmoor, Highlands-Baywood Park, Emerald Lake Hills, Ladera, La Honda, Loma Mar, Pescadero, Moss Beach, Montara, El Granada. All unincorporated communities in San Mateo County.

You don't have to figure this out yourself. We handle this every day. Most people call just to understand what's actually causing the smell. You're not committing to a project — just getting clarity.

Get a Free Quote 877-386-3677 — Call to Find Out What's Actually Causing the Smell

Ready to Stop the Odor at the Source?

If cleaning isn't getting the job done, you don't have a cleaning problem — you have urine odor embedded in the subfloor, drywall, or concrete below the surface. Free phone quote. The inspection is scoped before any work begins.

877-386-3677 — Call Now — Free Phone Quote (10 Minutes)Schedule a Pet Odor Inspection